//#define _CRT_SECURE_NO_WARNINGS 1
//#include "Stack.h"
//void Stack::Init()
//{
//	a = nullptr;
//	capacity = top = 0;
//}
//void Stack::Push(int val)
//{
//	//...
//}
//int Stack::Top()
//{
//	return a.[a.top - 1];
//}
